I thought this before the free weekend, but Mother of God...Playing against her every match now thus far just brings it to the front how overpowered this hero is. Why even bother making her melee when her Q is essentially a ranged attack on a 3 second CD? Less if she has CDR. Additionally her E lasts longer than the CD on it, which boggles the mind. Her ult resets her E and puts it on a 2 second CD. Then with Lobo's chain she can infinitely kite any and every melee hero in the game, because her Q applies on-hit effects, again lending the question as to why she is even melee?
Her non-ult E cooldown needs to be increased at the very least. In MOBA games the single most powerful thing is mobility. Anti-Mage is one of the most solid hard carries in DotA 2 because of his blink. Lee Sin is a common ban or pick in competitive play in League of Legends because of his insane utility and again mobility.
If not her non-ult E cooldown, then make it so slows are the only things not applicable to her Q. She already has her W for slow(which also doubles up as a knockdown after E). Something needs to be done to tone down this hero being so untouchable by melee heroes.
What's funny is that not even The Flash, a hero built around speed and chase down, can chase a Catwoman. In one of my games I watched as a compLexity member as Flash tried chasing down a Catwoman only to get kited, poked down, and then have the chase reversed and killed by the random Catwoman player. It was silly.